Revisions and updates to this layer include:
(UT = unnamed tributary)
8.) filename: hqorwdwq1099
The October 1, 1999 update consisted of:
a.) HQWZ boundary added around Thorpe Lake (Glenville, Big Ridge,
Highlands 24k quads / Fontana Lake 100k quad).
b.) HQWZ boundary added around Armstrong Creek (Celo, Little Switzerland
24k quads / Asheville 100k quad).
c.) HQWZ boundary added around Toms Creek (Little Switzerland, Marion West
24k quads / Asheville 100k quad).
d.) HQWZ boundary added around Mill Creek (Montreat, Old Fort 24k quads /
Asheville 100k quad).
e.) HQWZ boundary corrected around Mackey Creek (Old Fort 24k quad /
Asheville 100k quad).
f.) ORWZ boundary added around two portions of Indian Creek (Handing Rock
24k / Winston-Salem 100k).
g.) ORWZ boundary corrected near Bunches Creek (Bunches Bald 24k
quad / Knoxville 100k quad).
h.) 575 foot HQWZ buffer added around Ut to New River (Rufus Creek)
(New River Inlet 24k quad / New River 100k quad).
i.) HQW buffer removed from around Juney Whank Branch -- this Branch
is classified WS-II Tr (Bryson City 24k quad / Fontana Lake 100k quad).
j.) HQW buffer corrected around Mackey Creek (Old Fort 24k quad /
Asheville 100k quad).
7.) filename: hqorwdwq1298 The December 1998 update to this layer
consisted of projecting the data from NAD27 datum, State Plane
projection, units of measure feet TO: NAD83 DATUM, State Plane
PROJECTION, UNITS OF MEASURE METERS. This was done to comply with
the NC Geographic Information Coordinating Council's
"Statement of Direction for North Carolina Corporate Geographic
Database Horizontal Reference, Datum and Unit of Measure". This
reprojecting was done in various ways depending on the data type
and content. Vector data was projected using the 'project' command
in ESRI's Arc software and topology was cleaned and built based on
coverage needs. Raster data was projected using ESRI's Grid module
and various steps as applicable.
6.) filename: dwqhqorw1296 The name of this file
was changed from hqworwz to its current name at the request of the DWQ.
The December 11, 1996 update consisted of:
a.) 575 foot ORWZ buffer added around UT to Swan Creek Lake (Engelhard
NW, Engelhard East and Engelhard West 24k quads / Manteo and Plymouth
100k quads).
b.) 575 foot ORWZ buffer added around UT to Swan Creek (Engelhard NW
and Fairfield NE 24k quads / Manteo and Plymouth 100k quads).
c.) 575 foot ORWZ buffer added around UT to Alligator River (East Lake
and Buffalo City 24k quads / Manteo 100k quad).
d.) ORWZ boundary corrected around South Fork New River (Jefferson
24k quad / Boone 100k quad).
(The name of this file was changed again 4/20/96 to hqorwdwq to put
the agency name at the end. No other changes were made on 4/20/96.
This 4/20/96 file was not archived.)
5.) filename: hqworwz496 The April 9, 1996 update consisted of:
a.) ORWZ boundary corrected in small area near Rogers Bay (Spicer
Bay 24k quad / Wilmington 100k quad).
b.) ORWZ boundary corrected in small area along the Intracoastal
Waterway (Sneads Ferry 24k quad / New River 100k quad).
c.) Missing 575 foot buffer added along ORW edge of Harkers Island
and Browns Island (Harkers Island 24k quad / Morehead City 100k quad).
d.) Buffer removed from around Johnson Creek -- this Creek is
classified SA only (Horsepen Point and Davis 24k quads / Morehead
City 100k quad).
e.) Buffer removed from around Great Island Creek, Horse Island
Creek, and Fortin Bay -- these are classified SA only (Davis
24k quad / Morehead City 100k quad).
f.) Buffer removed from around Gutter Creek -- this Creek is
classified SA only (Styron Bay 24k quad / Morehead City 100k quad).
g.) 575 foot buffer fixed along outer banks (Wainwright Island 24k
quad / Morehead City 100k quad).
4.) filename: hqorwdwq396 The March 13, 1996 update consisted
of a UT pond buffer that was removed which affects the
Wilmington 100k (Scotts Hill 24k quad) area. A portion of
an ORW buffer was clipped off where Black River flows into
Cape Fear River which affects the Whiteville 100k (Leland 24k
quad) area. Buffers were added for the following small ORW
streams: Caggs Creek, Iron Creek, Willis Creek, Maria
Creek, and Oyster Creek which affects the Morehead 100k
(Horsepen Point 24k quad) area. A UT pond and a stream buffer
were removed which affects the Manteo 100k (East Lake and
Buffalo City 24k quad) area. Lastly, a UT pond and a stream
buffer were removed which affects the border of Manteo and
Plymouth 100ks (Engelhard NW, Engelhard East, Engelhard West,
and Fairfield NE 24k quad) area.
3.) filename: hqw395 (previously called nc.hqw495)
The March 7, 1995 update consisted of
100k stream classification changes to a long strip of Black
River and South River in Bladen, Sampson, and Pender counties.
The Elizabethtown and Whiteville 1:100,000-scale quadrangles
were affected.
2.) filename: hqw1194 (previoulsy called nc.hqw112894)
The November 28, 1994 update consisted of new boundaries
around Six Runs Creek, Black River, and South River, located
on the Elizabethtown 1:100,000-scale quad. These edits were
necessary because of recent 100k stream classification changes.
1.) filename: hqw494 (previously called nc.hqw494)
The April 1994 versions was the original version of this layer.
NC DENR, Division of Water Quality, 19991001, High Quality Water and Outstanding Resource Water Management Zones, Division of Water Quality: NC DENR, Division of Water Quality, Raleigh.Online Links:
- CGDB layer listing and Metadata - <http://www.cgia.state.nc.us/cgdb/index.html>
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 1
Ordinates (y-coordinates) are specified to the nearest 1
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1983.
The ellipsoid used is Geodetic Reference System 1980.
The semi-major axis of the ellipsoid used is 6378137.
The flattening of the ellipsoid used is 1/298.257.
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 513484992.000 |
| Units: | meters |
| Resolution: | .001 |
| Range of values | |
|---|---|
| Minimum: | 135.350 |
| Maximum: | 4803078.500 |
| Units: | meters |
| Resolution: | 0.001 |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 176 |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 175 |
| Resolution: | 1 |
| Value | Definition |
|---|---|
| HQW | HQW (High Quality Waters) is a supplemental classification intended to protect waters with quality higher than the minimum state water quality standards. These waters are rated as excellent based on biological and physical/chemical characteristics through Division monitoring or special studies. Only waters which have the HQW supplemental classification have HQW specific requirements and therefore appear in the GIS High Quality Water and Outstanding Resource Water Management Zones data layer. (Waters with at least as stringent protection requirements, and therefore HQW by definition, include those classified as WS-I, WS-II and SA. These waters do not carry the HQW supplemental classification, and are not included in the HQW/ORW Management Zones layer.) |
| ORW | ORW (Outstanding Resource Waters) is a supplemental classification intended to protect unique and special waters having exceptional state or national recreational or ecological significance. |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 126884.484 |
| Units: | feet |
| Resolution: | .001 |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 580 |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 580 |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 176 |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 174 |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 1.046 |
| Maximum: | 71474.242 |
| Units: | meters |
| Resolution: | 0.001 |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 612 |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 612 |
| Resolution: | 1 |
HQORWDWQ.PAT Polygon Attribute Table
COLUMN ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION
1 AREA 4 12 F 3 Total area in meters
5 PERIMETER 4 12 F 3 Total perimeter in meters
9 HQORWDWQ# 4 5 B - Poly internal id number
13 HQORWDWQ-ID 4 5 B - Poly user id number
17 CLASS 3 3 C - Identifier of HQW or ORW
20 ACRES 4 12 F 2 Acres per polygon
HQORWDWQ.AAT Arc Attribute Table
COLUMN ITEM NAME WIDTH OUTPUT TYPE DEC DESCRIPTION
1 FNODE# 4 5 B - From-node id of linear feature
5 TNODE# 4 5 B - To-node id of linear feature
9 LPOLY# 4 5 B - Left-side polygon id of linear
feature
13 RPOLY# 4 5 B - Right-side polygon id of linear
feature
17 LENGTH 4 12 F 3 Length of linear feature in meters
21 HQORWDWQ# 4 5 B - Internal id number
25 HQORWDWQ-ID 4 5 B - Internal id number
Division of Water QualityWater Quality Section
Water Quality Staff, Boyd Devane
NC Dept. of Environment and Natural Resources
512 N. Salisbury Street
Raleigh, NC 27604-1148
NCCGIA Director, Karen Siderelis
Database Administration, Zsolt Nagy
Database Management, Ken Shaffer
Project Manager, Cheryl Pearce
North Carolina Center for Geographic Information and Analysis
Governor's Office
Office of State Planning
301 North Wilmington Street, Suite 700
Raleigh, NC 27601-2825
(919) 733-5083 ext. 559 (voice)
(919) 715-5637 (FAX)
boyd.devane@ncmail.net
This data was created to assist governmental agencies and others in making resource management decisions through the use of a Geographic Information System (GIS).
NC DENR - Div. of Water Quality, 19961211, High Quality Water Zones: NC DENR - Div. of Water Quality, Raleigh, North Carolina.
NC DENR - Div. of Water Quality, 19961211, Outstanding Resource Water Management Zones: NC DENR - Div. of Water Quality, Raleigh, North Carolina.
Survey, US Geological , 1990, USGS 7.5 Minute series quadrangles: US Geological Survey, Reston, Virginia.
Survey, US Geological , 1986, USGS 30 x 60 Minute series quadrangles: US Geological Survey, Reston, Virginia.
Person who carried out this activity:
(919) 733-5083 559 (voice)
(919) 715-5637 (FAX)
boyd.devane@ncmail.net
Person who carried out this activity:
(919) 733-2090 (voice)
(919)715-0725 (FAX)
dataq@cgia.state.nc.us
U.S. Geological Survey, 1984, Hydrography (1:100,000) Digital Line Graphs: U.S. Geological Survey, Reston, Virginia.Online Links:
- CGDB layer listing and Metadata - <http://www.cgia.state.nc.us/cgdb/index.html>
NC CGIA digitized the HQW boundaries from paper USGS 1:24,000 topo maps and attributed them with DEM classifications of HQW or ORW. The digital files were plotted and overlayed to the originals label corrections were made.
High Quality Waters were marked on 7.5 Minute USGS paper topographic maps, and Outstanding Resource Water were generated from 30 x 60 Minute series USGS digital line graphs, both of which meet National Map Accuracy Standards, using a best estimate with reference to surrounding features. Boundaries drawn were digitized and check plots used to ensure correct boundary location within a line-width.
These data represent the locations of waters surrounding regions of streams or bodies of water identified as having excellent (high) water quality; or, designated as an outstanding resource in North Carolina, as mapped by the NC DWQ. Each polygon is labeled as either HQW or ORW. All boundaries are approved by DWQ, whether they are the original DEM boundaries or changes to original boundaries submitted for revision by local or county governments.
Using ESRI's ARC/INFO GIS software, the data set was built for polygon topology using the "build" command. The data set was then cleaned with using the 'clean' command. Topology has not been edited since the last build or clean.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints:
- Acknowledgement of products derived from this data set should cite the following: The source of the High Quality Water and Outstanding Resource Water Management Zones, Division of Water Quality is the North Carolina Corporate Geographic Database. Earlier versions of this dataset may exist. The user must be sure to use the appropriate data set for the time period of interest. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, CGIA cannot assume liability for any damages or misrepresentation caused by any inaccuracies in the data or as a result of changes to the data caused by system transfers.
(919) 733-2090 (voice)
(919) 715-0725 (FAX)
dataq@cgia.state.nc.us
High Quality Water and Outstanding Resource Water Zones Management Zones, Division of Water Quality
NCCGIA is charged with the development and maintenance of the State's corporate geographic database and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information about the state. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop the corporate database may be reflected in the data supplied. The client must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. NCCGIA does not support secondary distribution of this data. The use of trade names or commercial products does not constitute their endorsement by the NCCGIA or North Carolina State Government.
FOR DIGITAL OR NON-DIGITAL DATA, Contact NC CGIA, Data Distribution to order data, Phone 919.733.2090 ... Email dataq@cgia.state.nc.us ... Web Page order form <http://www.cgia.state.nc.us/cgdb/index.html>
For current FORMAT/MEDIA INFORMATION, use a web browser: <http://www.cgia.state.nc.us/cost.html> or phone NC CGIA Data Distribution 919.733.2090
Data creation and large data analysis jobs contact Database Administration P:(919)733-2090. All data is available through standard ordering procedures on a cost recovery basis.
All formats supplied are created using ARC/INFO GIS software on Unix workstations. Other formats are available. Format compatibility is the user's responsibility. For more information on formats and media, use a web browser: FORMAT/MEDIA INFORMATION - <http://www.cgia.state.nc.us/cost.html>
(919) 733-2090 (voice)
(919) 715-0725 (FAX)
dataq@cgia.state.nc.us